CH262973A - Process for the preparation of an imidazoline. - Google Patents
Process for the preparation of an imidazoline.Info
- Publication number
- CH262973A CH262973A CH262973DA CH262973A CH 262973 A CH262973 A CH 262973A CH 262973D A CH262973D A CH 262973DA CH 262973 A CH262973 A CH 262973A
- Authority
- CH
- Switzerland
- Prior art keywords
- imidazoline
- parts
- naphthyl
- preparation
- sulfide
- Prior art date
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Nitrogen Condensed Heterocyclic Rings (AREA)
Description
Verfahren zur Herstellung eines Imidazolins. Gegenstand des vorliegenden Patentes ist ein Verfahren zur Herstellung eines Imidazo- lins, das dadurch gekennzeichnet ist, dass man 4-Methoxy-naphthyl-(1)-essigsäurenitril in Gegenwart von Schwefelwasserstoff mit Äthy- lendiamin umsetzt.
Das so erhaltene 2-[4'-blethoxy-naphthyl- (1')-methyl]-imidazolin ist bekannt. und soll als Heilmittel Verwendung finden.
Die Umsetzung erfolgt in An- oder Ab wesenheit von z. B. organischen Lösungsmit teln, wie Äthanol, Toluol, Xylol und derglei chen, vorzugsweise bei erhöhter Temperatur, gegebenenfalls im geschlossenen Gefäss. Der Schwefelwasserstoff kann auch im Verlauf der Reaktion aus Schwefelwasserstoff ab gebenden Mitteln, wie Schwefelwasserstoff salzen des Äthylendiamins, Schwefelkohlen stoff, Phosphorpentasulfid, Alkalisulfiden, Ammoniumsulfiden, Eisensulfid oder Alumi niumsulfid, gegebenenfalls in Gegenwart von geringen Mengen Wasser, gebildet werden.
Beispiel <I>1:</I> 39,4 Teile 4-Methoxy-naphthyl-(1)-essig- säurenitril, 13,9 Teile Äthylendiamin, 95 70 ig, 2 Teile Aluminiumsulfid, 1,3 Teile kristalli siertes Natriumsulfat und 140 Teile absolutes Äthanol werden in einem Druckkessel mit Rührer während 12 Stunden auf 90 bis 1000 erhitzt. Nach dem Abkühlen -wird das Ätha- nol abdestilliert, der Rückstand mit.
verdünn ter Salzsäure versetzt, die Lösung filtriert und eingedampft. Man nimmt nochmals in absolutem Äthanol auf und filtriert von wenig unlöslichem Äthylendiamin-dihydro- chlorid sowie von anorganischen Salzen ab, wonach das Äthanol abdestilliert und der ver bleibende Rückstand aus Butanol umkristalli siert wird. Man erhält so das 2-[4'-1lethoxy- naphthyl- (1') -methyl ] -imidazolinhydrochlorid vom Schmelzpunkt 218 bis 2190.
Statt Aluminiumsulfid kann ebensogut Ei sensulfid verwendet werden.
<I>Beispiel 2:</I> 118,2 Teile 4-Methoxy-naphthyl-(1)-essig-, säurenitril, 41,7 Teile Äthylendiamin, 95 % ig, und 3,0 Teile Schwefelkohlenstoff werden während mehreren Stunden auf etwa 90 bis 1000 erhitzt, wobei Ammoniak entweicht. Nach beendeter Umsetzung wird das Reak tionsprodukt, eventuell unter Zusatz von v enig Zinkstaub, destilliert.
Man erhält so in sehr guter Ausbeute das 2-[4'-llethoxy-naph- thyl-(1')-methyl]-imidazolin, dessen Hydro- chlorid bei 218 bis 2190 schmilzt.
Process for the preparation of an imidazoline. The present patent relates to a process for producing an imidazoline which is characterized in that 4-methoxy-naphthyl- (1) -acetic acid nitrile is reacted with ethylenediamine in the presence of hydrogen sulfide.
The 2- [4'-blethoxy-naphthyl- (1 ') -methyl] -imidazoline obtained in this way is known. and is said to be used as a remedy.
The implementation takes place in the presence or absence of z. B. organic solvents such as ethanol, toluene, xylene and the like Chen, preferably at elevated temperature, optionally in a closed vessel. The hydrogen sulfide can also be formed in the course of the reaction from hydrogen sulfide donating agents, such as hydrogen sulfide salts of ethylene diamine, carbon disulfide, phosphorus pentasulfide, alkali sulfides, ammonium sulfides, iron sulfide or aluminum sulfide, optionally in the presence of small amounts of water.
Example <I> 1: </I> 39.4 parts of 4-methoxy-naphthyl- (1) -acetic acid nitrile, 13.9 parts of ethylenediamine, 95 70 ig, 2 parts of aluminum sulfide, 1.3 parts of crystallized sodium sulfate and 140 parts of absolute ethanol are heated to 90 to 1000 for 12 hours in a pressure vessel with a stirrer. After cooling, the ethanol is distilled off, the residue with.
dilute hydrochloric acid is added, the solution is filtered and evaporated. It is taken up again in absolute ethanol and filtered from slightly insoluble ethylenediamine dihydrochloride and inorganic salts, after which the ethanol is distilled off and the remaining residue is recrystallized from butanol. The 2- [4'-1lethoxynaphthyl- (1 ') -methyl] -imidazoline hydrochloride with a melting point of 218 to 2190 is thus obtained.
Iron sulfide can just as well be used instead of aluminum sulfide.
Example 2: 118.2 parts of 4-methoxynaphthyl (1) acetic acid nitrile, 41.7 parts of ethylenediamine, 95% strength, and 3.0 parts of carbon disulfide are on for several hours about 90 to 1000 heated, with ammonia escaping. After the reaction has ended, the reaction product is distilled, possibly with the addition of a little zinc dust.
2- [4'-llethoxy-naphthyl- (1 ') -methyl] imidazoline, the hydrochloride of which melts from 218 to 2190, is obtained in this way in very good yield.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH259250T | 1945-06-06 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH262973A true CH262973A (en) | 1949-07-31 |
Family
ID=4473036
Family Applications (6)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH262973D CH262973A (en) | 1945-06-06 | 1945-06-06 | Process for the preparation of an imidazoline. |
CH262974D CH262974A (en) | 1945-06-06 | 1945-06-06 | Process for the preparation of an imidazoline. |
CH262975D CH262975A (en) | 1945-06-06 | 1945-06-06 | Process for the preparation of an imidazoline. |
CH262971D CH262971A (en) | 1945-06-06 | 1945-06-06 | Process for the preparation of an imidazoline. |
CH259250D CH259250A (en) | 1945-06-06 | 1945-06-06 | Process for the preparation of an imidazoline. |
CH262972D CH262972A (en) | 1945-06-06 | 1945-06-06 | Process for the preparation of an imidazoline. |
Family Applications After (5)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH262974D CH262974A (en) | 1945-06-06 | 1945-06-06 | Process for the preparation of an imidazoline. |
CH262975D CH262975A (en) | 1945-06-06 | 1945-06-06 | Process for the preparation of an imidazoline. |
CH262971D CH262971A (en) | 1945-06-06 | 1945-06-06 | Process for the preparation of an imidazoline. |
CH259250D CH259250A (en) | 1945-06-06 | 1945-06-06 | Process for the preparation of an imidazoline. |
CH262972D CH262972A (en) | 1945-06-06 | 1945-06-06 | Process for the preparation of an imidazoline. |
Country Status (2)
Country | Link |
---|---|
CH (6) | CH262973A (en) |
ES (1) | ES173692A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2691385A (en) * | 1949-06-09 | 1954-10-12 | Carrie Asbeck | Safety valve for hydraulic brakes |
-
1945
- 1945-06-06 CH CH262973D patent/CH262973A/en unknown
- 1945-06-06 CH CH262974D patent/CH262974A/en unknown
- 1945-06-06 CH CH262975D patent/CH262975A/en unknown
- 1945-06-06 CH CH262971D patent/CH262971A/en unknown
- 1945-06-06 CH CH259250D patent/CH259250A/en unknown
- 1945-06-06 CH CH262972D patent/CH262972A/en unknown
-
1946
- 1946-05-23 ES ES173692A patent/ES173692A1/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
CH262971A (en) | 1949-07-31 |
CH262975A (en) | 1949-07-31 |
CH262972A (en) | 1949-07-31 |
ES173692A1 (en) | 1946-07-01 |
CH259250A (en) | 1949-01-15 |
CH262974A (en) | 1949-07-31 |
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